Instantiating and calling Python classes from using Boost.Python within C++

PyC++Redis.cpp

// I had the worst time in the world trying to determine how to do this. 
// I did not find the answer in one concise resource. I figured I'd make this available
// to anyone else having the same trouble. 

#include <usr/include/boost/python.hpp> // use your path here
#include <iostream>
#include <string>

namespace py = boost::python;

int main()
{
    Py_Initialize();
    py::object
        mRedis, // the Redis module
        iRedis, // the Redis instance
        vRedis, // the redis return value;
    std::string cString; // to hold our string that we extract from redis...

    // The following two lines are the equivalent of: 
    // import redis
    // iRedis = redis.Redis()
    mRedis = py::import("redis");
    iRedis = mRedis.attr("Redis")();

    // Then, we're ready to roll! Let's set and get values with redis:
    iRedis.attr("set")("my.namespace.key", "Hello, Redis & C++ & Python!");
    vRedis = iRedis.attr("get")("my.namespace.key");
    cString = py::extract<std::string>(vRedis);
    std::cout << cString << std::endl; //displays "Hello, Redis & C++ & Python!");

    return 0;
}

The reason why I chose the Redis interface is because the c++ redis interface is underutilized, under documented, and not updated.The original problem I was trying to solve was to do explicitly this!